做全备测试的时候碰到下面情况，此时数据库服务已经关闭。
[dmdba@localhost ~]$ dmrman dmrman V7.6.0.197-Build(2019.09.12-112648)ENT RMAN> backup database '/dm7/data/DM01/dm.ini'; backup database '/dm7/data/DM01/dm.ini'; file dm.key not found, use default license! checking if the database under system path [/dm7/data/DM01] is running...[4]. checking if the database under system path [/dm7/data/DM01] is running...[3]. checking if the database under system path [/dm7/data/DM01] is running...[2]. checking if the database under system path [/dm7/data/DM01] is running...[1]. checking if the database under system path [/dm7/data/DM01] is running...[0]. checking if the database under system path [/dm7/data/DM01] is running, write dmrman info. EP[0] max_lsn: 59275 BACKUP DATABASE [DM01],execute...... os_pipe2_conn_server open failed, name:[/home/dmdba/DM_PIPE_DMAP_LSNR_WR], errno:2 CMD END.CODE:[-7109],DESC:[Pipe connect failure] [-7109]:Pipe connect failure RMAN> exit exit
但是奇怪的是，直接cd到 dmrman的路径下面执行，是可以成功的，可能是执行备份时没有找到需要的文件。
[dmdba@localhost ~]$ cd /dm7/dameng/bin [dmdba@localhost bin]$ ./dmrman dmrman V7.6.0.197-Build(2019.09.12-112648)ENT RMAN> backup database '/dm7/data/DM01/dm.ini'; backup database '/dm7/data/DM01/dm.ini'; file dm.key not found, use default license! checking if the database under system path [/dm7/data/DM01] is running...[4]. checking if the database under system path [/dm7/data/DM01] is running...[3]. checking if the database under system path [/dm7/data/DM01] is running...[2]. checking if the database under system path [/dm7/data/DM01] is running...[1]. checking if the database under system path [/dm7/data/DM01] is running...[0]. checking if the database under system path [/dm7/data/DM01] is running, write dmrman info. EP[0] max_lsn: 59275 BACKUP DATABASE [DM01],execute...... CMD CHECK LSN...... BACKUP DATABASE [DM01],collect dbf...... CMD CHECK ...... DBF BACKUP SUBS...... total 1 packages processed... total 3 packages processed... total 4 packages processed... DBF BACKUP MAIN...... BACKUPSET [/dm7/data/DM01/bak/DB_DM01_FULL_20191031_025308_000315] END, CODE [0]...... META GENERATING...... total 6 packages processed... total 6 packages processed! CMD END.CODE:[0] backup successfully! time used: 7030.115(ms)
